Improvement in hot-air furnaces



W. 8v W. JAMES, J1.

Hot-Air'Furnaoe.

. Patented Nov. 1', 1870 MPETERS. PHOTO-UTHOGRAPHER, WASHINGTON. D C.

cada eine WILLIAM JAMES ANI)` WILLIAM JAMEsI'JIi., ori MONTREAL, oANAnA.

Letters Patent No. 108,790, dated November 1, 1870.

IMPROVEMENT IN HT-AIR FURNApCES.

'Mini- The Schedule referred to in these Letters Patent and making part of the same.

To all whom it may concern',-

Be it known that we, WILLIAM J Anus and WIL- LIAM JAMES, Jr., ot thc city of Montreal, in the District of Montreal, Province ot' Quebec, Dominion ot Canada, have invented a new and useful Improvement in Hot-air Furnaces; and we do hereby declare that the following is a full, clear, and exact de scription thereof, which will enable others skilled in the art to make and use the saine, reference being had to the accompanying drawing forming part ot' this specification, in which- Figure l is a vertical longitudinal section of our improved furnace.

Figure 2 is a horizontal section of the sznnr, taken through the line o: a', fig. 1

Figure 3 is a horizontalsection of thc same, taken through the line y y, Iig. l.

Similar letters ot' reference indicate corresponding parts.

Our invention has for its object to improve thc constructionot' hot-air furnaces so as to obtain a greater amount ot' heat ti-om the same amount ot' fuel than is possible with furnacesconstructed in the ordinary manner; and

It consist-s inthe construction and combination of the various parts ot' the furnace, as hereinafter more fully described.

A is al plate, made ot' suitable form t'or the bottom of the ash-pit 1i, and which is connected with the ring-plate 0 by S or other shaped arms D, leaving a space between the outer edge ot the plate A, and the inner edge of the ring-plate C, for the free passage of the air to be heated.

thc plate A is extended' ont to the ring-plato (i, to form the bottom ot' the month of' the said ash-pit, as

shown in iignrcs 1 and 2.

E is a curved plate which forms the sides'otl thc ash-pit, and the ends of which .are extendedto form the month of the ash-pit, which is closed with a door, 11, in the lower partotvwhich are formed draught-openings b,'which should he provided with a sliding-dainpcr.

1n the upper parlJ ot' the door lf is formed another d raught-opcning, closed with a small door b2, so that thc draught ot the furnace may be regulated at will.

lith thc upper odge ot' the plate E, is connected the lower edge ot' the plate Gr, which forms the sides of the fire-pot Il, said fire-pot being Inadtl in thc form otan inverted truncated cone.

With the upper odge ot' the plate G 'is connected the inner edge of the disl1-shapcd ring-plate I, which is perforated to receive thc lower cnds of the airpipcs J, and with thc outer edge ofwliich is connected the lower cdgc ot the plate K, which forms the walls of the chamber L, which forms a continuation 'or extension ot' thc lire or combustion-chamber H.

At the front of the furnace,

lhe ends of the plat-e K are ext-endedvout to the front .of the furnace, to form the opening for the 1ntroduction of fuel, which opening is closed with a A'closelytting door, M.

` fith theupper edge ot' the plate K is connected the outer edge of the plate N, the middle part a ot' which is made-in the form of an inverted cone, as shown in tig. 1, so as to distribute the product-s ot combustion equally around the outer part of the chamber L, and about the air-pipes J.

rlhe outer or horizontal partot' the plate N' is per;

forated to receive the upper ends of the air-pipes J, as shown in fig. l The air-pipes J are thus passed 'through the chamber L, and have both their ends open, so that the air may pass through them freely,

and while passing through may be exposed to the full heat of the chamber L.

rIllhc horizontal part of the plate N is also pcrn'ated to receive the lower ends of the short pipes O,tl1'c upper ends ot' which -enter pcrforations in the horizontal part ot'. the base plate ofthe drum l), so that the products ot' combustion may pass through the pipes O from the chamber L to the drum P.

The outer or horizontal parts of the top and bottom plates of the drum ll are perforated to receive the upper and lower ends of the' air-pipes Q, so that the air while passing through said pipes Q may be exposed to the t'nll heat ot' thc products of combustion in the drum l.

The ends of the side plate ot' the drum P are ex tended ont to the front ot' theffurnace, to form an opening closed with a small` door, 1t, for convenience in renwring theashes and cndcrs that may lodge in the said drum l. v

The middle part of the base plate of the drum 1 is bent upward in the shape ot' a truncated cone, and the upper part ot' saidbcnt plate is extended in the form ot' a pipe or-tube, to meet the downwardly-pro-l jecting topplate of the drum` S, thus forming au airtube pipe or passage for the air through the middle parts of the drums l and S, as shown in g..1. The middle part ofthe top plate of the drum P is bent upward to moet the downwardly-projcoting middle part of the bottoni plate of the drum S, thus forming a ring-shaped passage for the products ot combustion to passfthrough trom the drum l to the drum 'lhe ends of the sidc plate of the drum S are extended to the front of the furnace, to form an opening' which is closed with a small door, .l, for convenience in removing the ashes and cinders that may -lodge in the said drum The outer or horizontal' parts of the top and hottom plates of the drum S are perforated to receive the Vupper and lower cnds of the air-pipes U, so that the air, in passing through -the said pipes U,

tutti (ittica maybe exposed to the full heatof the products of combustion in the said drum S.

is bent upward into the form ot' a truncated cone, its4 upper edge being connected with the inner edge ot' the top plate ot' said drum, as shown in .lig. 1.'

'lhe top and bottom plates ot' the drain are perforated to receive the ends ot' the pipes X, so that the air in passing through said pipes may receive any heat that may'still be in the smoke and other products ot' combustion passing through the drum lhe ends ot' the side plate et' the drinn \\'r are connected with the sides ofthe box Y, which pro-I ject 'at the rear side ot' the furnace, and with which the smoke-pipe Z is connected that receives the smoke and other products oi' combustion and conducts them to the chimney.

111 the outer end o1' the box l' is i'oriued an opening, closed with'a small door, A', for convenience in removing the cindcrs, ashes, Mi., that may, have lodged inthe said drum iV.

li is the outer casing et' the furnace, the lower edge of which' is connected with the ring-plate C, and the uppeil end ot which is provided. wit-h pipes U, one or more, to conduct the heat-cd air to the room or rooms to be warmed. The middle'or hottest part ot' the furnace may be providedrwith an :alditionalf plate or casing when desired or necessary, or when thc furnace is to -stauducar woodwork, to prevent the outer case from becomingl too p greatly heated.

Having,l thus described our invention,

We claim as new and. desire to secure Patentp 1. '.Lhe combination ot' the plate A, arms D, ringplate AC, plate E, door F with its draught-openngs, plate dished, ring-plate I, air-pipes J, plate K with its doei' M, ring-plate N, pipes O, drum l with its air-pipes Q and door-R, drum S with its air-pipes 'Il and door T, pipes V, drum W' with itsy air-pipes X, box Y, and door A', smoke-pipe Z, and outer ease B', Vprovidedwith one or 'more hot-air pipes U', 'with each other, said `parts being 'construc-ted and operating` substantially as herein shown and described,aud for the purposeset forth..

2. The cone fa', projcctinf downward above the by Letters `lire-chamber ot t-he furuac, 111 combination with the other `parts of the furnace, substantially as herein shown and described, and for the purpose Iset forth.

3. Vlhe drums l* S \*V, one or more, provided with their smoke-pipes, and with their air-pipes and passages, in combination with the other parts of the furnace., substantially as herein shown anddescribed1 aud i'or the purpose set forth.

' \VILLIAM JAMES.

VV'ILLIAM J AMES, J u.

: Witnesses:

Jamas (J. ltrreuen,

0f the city of Montaea?, Gentleman. 511mm' A. DUNLEVle,

0f Montreal, Notarial Ulcrk. 

